Improvement in foot-power machines



UNITED STATES PATENT CEEICEo FREDERICK S. STODDARD, OF LITCHFIELD,CONNEC'IICU'T.4

IMPROVEMENT IN FOOT-POWER MACHINES.

Specication formingpart of Letters Patent No. 24,064, dated May 17,1859. l

' chinery; and I do hereby declare that the following is a clear andexact description, referring to the drawings making part of this speci-vfication.

The nature ofmy invention consists in two modes-` First, of a two-throwcrank on one shaft, to whichy is attached only one pitman to connectwiththe foot-piece or treadle. The other crank, being nearly at a rightangle, has a lever made to bear' against it by the action of a weakspring, which will always hold the pitman-crank in the positionforstarting and rotating the shaft in one given direction.

Second, a single crank having an adjustable spring bearing upon it,which is attached to the foot-piece. v

In order to enable others skilled in the art to make and use myinvention, I will describe both modes, referring to the drawings and theletters thereon. l

Figure 1 represents in perspective the brackets or frame A A to supporta lathe or table.' The crank-shaft B is hung on journals b b2 at theends. C is the center crank, to

- which the pitman c is attached to connect it with the foot-piece D.The crank E, upon the same shaft, is at a right angle to the crank C,and is Vpressed upon its bearing by a lever, F,

which works upon a pivot, f, and is held tol its position bythe springg. Another mode is shown in the single crank-shaft H, which has thepitman I and the spring J, both operating on the same throw ofthe crankand running parallel with each other, both connect# ing with thefoot-piece K at the back end,

whichgis nearly balanced on the bar L. The I set-screwsl Z, back andfront, are to adjust the pressure on the spring J, so as to cause the.

shaft to rotate in either direction, as may be required. v

It is of great importance in foot-power machinery that the crank shouldremain in a position to always start in the right direction. This I haveeffectually accomplished without the aid of a counter-balance. I

Having thus described my improvements in foot-power machinery, ywhatIlclaim as new, and desire to secure by Letters Patent, is

1. A two-throw crank operated by one pitman, in combination with a leverand spring or their equivalents, as described.

A2. The mode of attaching the spring to the foot-piece to operate on thepitman-crank, in connection with the setscrews for adjusting andreversing the motion, as set forth.

. FREDERICK S. STODDARD.

Witnesses:

AMos W. KILEOUEN, GEO. C. WOODRUFF.

